“There’s less need for medical inventory because we have less medical customers,” said Andy Williams, owner and CEO of Medicine Man, one of Colorado’s largest legal marijuana stores selling both recreational and medical marijuana. “People don’t want to go through the hurdles to get their cards anymore.”

A similar scenario will likely play out for Nevada’s pot dispensaries when recreational marijuana sales begin July 1. The first four states to legalize recreational marijuana sales — Oregon, Alaska, Washington and Colorado — have all seen a dip in the number of active medical card-holding patients.